Thank you for your interest in our services. Usage is pretty much up to you (client) and your needs. Personally, I'm using these pretty much everywhere (money sites built on these, pillar content, T1, PBN...), depending of the need and quality.
Regarding copyright, I can not make any claims as these are expired articles after all, so situation is same as with PBN domains or resurrecting PBN domain content.
This is not article writing service. If you are looking for expired articles that pass Copyscape premium high quality check - we have them in that niche.
If you have any other questions please do let me know.
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All orders and samples have been processed for the day!
If you guys have any questions or concerns feel free to contact me here or via private messages anytime.